1. *Department of Medicine 1, University Hospital of Schleswig-Holstein, Lübeck, Germany
2. †Institute for Endocrinology & Diabetes, Department of Internal Medicine 1, University Hospital of Schleswig-Holstein, Lübeck, Germany
3. ‡Department of Otorhinolaryngology, University Hospital of Schleswig-Holstein, Lübeck, Germany
4. §German Center for Diabetes Research, Neuherberg, Germany